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(-No Model.) P. S. EWINS.

SORGHUM EVAPORATOR. No. 284,123. PatentedAug 28, 1883.

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I PATENT OFFICE.

a q i l rnILo s. EWINS, on wnsrr BERKSHIRE, VERMONT.

SORGH LlM-E V APORAT O R.

SPECIFICATION forming part of Letters Patent No. 284,123, dated August 28, 1883.

Application filed May 18, 1883. (No model.) i V 1) (LE whom it may concern:

.zen of the United States, residing at West Berkshire, in the county of Franklin and State of Vermont, have invented certain new and useful Improvements in SorghumeEvaporators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such aswill enable others skilled Io in the art to which it appertains to make and use the same. i i a My invention relates to sorghum-evapora tors, the purpose of which is to thoroughly utilize the heat while at its greatest intensity I 5 at the point where most desired-namely, at

the boiler-to permit the products of combustion to pass, under proper regulation, through i the return-fines of said evaporating-pan; to

I increase the heating-surface of the evaporating-pan; to-permit the removal of the boiler from the arch and the direction of the heat and flame immediately into the 16l311111-fl116S to enable the products of combustion to be directed into one or more groups of return i fines, as desired, and to protect the sirup compartments from too intense heat, thereby preventing the scorching or discoloration of the sirup.

'To these ends my invention consists of the 0 parts and combination of devices substantially as hereinafter described, and particularly pointed out in the claims.

Referring to thea'nnexed drawings, Figure 1 is a plan view of my improved sorghumevaporator. Fig. 2 is a longitudinal vertical section on line as m, Fig. 1. Fig. 3 is a transverse section on line y 51 of Fig. 2. Fig. 4 is a similar section-on line Z Z of Fig. 2, and Fig. 5 is a cross-sectionon line 2 z of Fig. 2. 1

Corresponding parts in the several figures are indicated by similar letters of reference. In the accompanying drawings, A rmarks the furnace, having grates a, door a, and adapted to permit my improved sorghum- 5 evaporator, with its accompanying mechanism, to rest upon its walls and form the top .thereof.

B represents the boiler, placed upon a castmetal frame, 0, which latter in turn rests on the walls of the furnace at its rear end. The

" boiler is provided with a number of pipes, 1), depending from its bottom into the space in the frame 0, said pipes having their lower ends closed and arranged alternately in parallel lines, as clearly shown, so as to interfere with and arrest the currents of heat and cause them to act upon the saccharine liquid in the pipes and boiler. The boiler hasa spout, b, to allow the liquidto pass therefrom into the first of a number of sections into which the '60 evaporating-pan D is, by partitions d, longitudinally divided. With the exception of the. last section, which is subdivided by the partitione into two parts, termed the sirup-compartments, each section is provided with a group or set of flues, E, passing through the pan and extending forward into the smokebox F, to which they are-connected by an ordinary expansion-joint to allow for the expansion and contraction of said pipes. The rear end of the pan D rests on the bottom of the frame 0, while its forward end rests on the plate G, arranged on the walls of the furnace. The smoke-box is provided with the ordinary smoke-exit, f,- a pair of doors, f, at its front to permit the fluesto beeleaned, a slidingdamper, f in its bottom to allow the smoke, &c., to pass from the fire-box directly into the smoke-box, and a sliding registerdamper, f arranged out of contact with the fines E, so as to imperfectly arrest the draft when said damper is drawn out. \Vith the exception of the doors f, the foregoing parts are particularly set forth in the patent granted to me July 18, 1882, and numbered 261,325.

Between the flues in the sections of the evaporating'pan D, and at the partitions d, the bottom of said evaporating-pan is .crimped, as clearly shown at H, Fig. 3, to increase the amount of heating-surface, and thus facilitate the evaporation of the saccharine liquid contained in the pan. These crimps H are not extended the length of the pan to meet the front and rear walls thereof, but before reaching thesame are beveled or tapered off, so as to meet the bottom of the pan at its point of juncture with said front and rear walls, as is clearly indicated in Figs. 1 and 2. This construction is provided to prevent the burning out of the front and rear walls at the points Where otherwise the crimps would meet said walls; and, further, to permit the free flow of liquid in the sections, and from one section to another,in the manner to be presently set forth.

The liquid passes from the boiler B by means of the spout b intothe first section of the pan D, and has free flow therein from one side of the crimp H, between the fiues E, to the other by reason of the beveling or tapering of the crimp, as described, and thence passes into the second section through the triangular opening or gate h, walled in by the crimp H at that point, the partition d, and the front wall of the pan. Atthe other end of said partition th1s triangular opening is closed by an extension ,cla1 m,jand, desire to secure by Letters Patent of the United, States, is-

or lip, which is made to fit the space to prevent the passage of liquid therethrough. This construction is clearly shown in Fig. 2. The

by means of partitions d, and provided with partition dividing the last section from the sirup-compartment extends to the bottom of the pan, the crimp being dispensed with to prevent any burning of the sirup. The saccharine liquid flows through the several sections in the direction of the arrows, and enters as sirup into the first of the sirup-compartments,

and thence into the second compartment, the

' by means of partitions (1, each section provided with'a set of flues, E, said panhaving crimps H inits bottom, arranged between the flues and at the points of partition and beveled or tapered, as described, and the partitions d, I eachhaving a depending extension at one end, as set forth, and for the purpose described.

gatese being provided for that purpose.

Referring to the cast-metal frame O,-which serves as a cover for the rear end of the furnace A, and upon which rests the boiler, 0 marks an opening extending nearly the width of the frame, andadapted to be closed'by the damper 0, when desired. This opening is pro.-

vided near the rear wall-of the frame, so as to 3 :asmoke-box over its front wall, of an evap- 'orating-pan provided with a number of inter- .nal flues, the boiler in rear of the pan, and :having a number of pipes, 11, with closed ends, L depending from the bottom thereof, and a metal frame provided with an opening, 0, located Ztherein back of the pipes b, as and for the purpose set forth.

cause the products of combustion to be carried rearwardly beyond the fines E, and-be directed against thebottom of the boiler B andits pipes 12 before entering the return-fines E. It will be noticed that the evaporating-pan is out of contact'with the boiler B, and that the intervening space is covered by a top plate, J of the frame 0. The space between this top plate andthe bottom of the frame 0 is divided into a number of sections or spaces by means ofpartitions j, corresponding in number andin line with the partitions (1 of the evaporating-pan D. The space jf immediately back of the sirup-compartments, is entirely inclosed to provide a dead-airspace to protect the rear wall of the sirup-'eompartments against the strong heat, and thereby prevent any burning or discoloration of the sirup in said compartments. The other sections have openings L in the bottom of the frame, communicating with the fire-space-of the furnace, said openings being ordinarily closed by the individual pivoted dampers K, arranged one in each section. .VVhen, after a sufficient quantity of saccharine liquid has beendischarged from theboiler into the evaporatingpan, the former may be removed from the frame 0, the operator first taking theprecaution to close the dampers 0. Upon the removal of the boiler the dampers K,or one or more of them, are opened with the aid of a'hook engaging with the eye j and held in iavertical plane by reason of the projection or rest j se sections of the frame 0, when the products of combustion pass from the furnace through the openings L in the bottom of said frame 0, and

; thence 'into fiues E, or one or more sets of them, as desired.

If desired, the damper 0 may be made in two parts, tobe operated from either side of the frame.

Having thus described my invention, what I 1. The evaporating-pan divided into sections crimps H in its bottom, which meet the lower 2; The evaporating-pan divided into sections 3. The combination, with a furnace having 4.. Thecombination, with an evaporatingpanprovided with a sirup-compartment, of a 6. The furnace having a smoke-box over its front wall, the evaporating-pan provided with a number of internalsmoke-flues, andtheeastmetal frame 0 J, having the opening a, the damper c, the partitionsj, the openings L Z, and the dampers K, in combination, as shown and described. I

In testimony whereof I affix my signature in presence of two witnesses.

PHILO S. EWINS.

WVitnesses:

W. H. YAW, L. O. Snnvnns. 

